Thyroid swelling, also known as GOITRE or goiter, is a medical condition in which the thyroid gland becomes abnormally enlarged. It can be caused by a variety of factors, including iodine deficiency, autoimmune disorders, and certain medications. GOITRE and goiter are both terms used to describe the same condition, and they are often used interchangeably. Treatment for thyroid swelling depends on the underlying cause, but may include hormone replacement therapy, dietary changes, and surgery.